Chlorates induce pitting corrosion of iron in sulfuric acid solutions: An analysis based on current oscillations and a point defect model

Current oscillations are employed to investigate the chlorate effect on the iron passivity in sulphuric acid solutions. It is shown that chlorates induce pitting corrosion due to the chlorides produced via the reduction of chlorates by ferrous ions. General and pitting corrosion are explained by using a point defect model.